Spring-key for type-writers.



C. H. JANSEN. -SPR|NG KEY FOR TYPE WRITERS.

APPLICATION FILE D APR.8, 191'8. 1,293,105. Patented Feb. 4,1919.

' jaw 6 M v I 1 UNITED STATES PATNT FFIGE.

C ll-Es H. JANSEN', F BRO QKL YN'; NEW YORK-ASSIGNOR TO SPEED KEY MANUFAC- T RING COMPANY, INC., A CORFQBATION OF NEW YORK. I

srnnieknr roe rrrn-wmrnns. 4 i 1 I r 1,293,105. v Speciflcationof Letters Patent: Patented Feb. 4, 1919.

. Application filed April s, 1918. Serial No. 227,303.

To all whom it may concern: The member which is directly secured to Be it known that LCHARLES H. JANsnN, the top 2 consists of a ring 4 having a vera citizen of the United States, and a resitical wall surrounding the top 2. This ring dent of the borough of Brooklyn, city and has an inturned flange 5 around its upper 6 State of New York, have invented certaln edge, for a purpose which will appear, and 6 new and useful Improvements Springit is provided withinturne'd projectlonsfibe- Keys for Type-Writers, of which the followlow, formed by lndentations there being ing is a specification. three PI'OJBCtlOIlS indlcated 1n the drawlng.

The present invention relates to spring T e ring 4: also has downwardly and m- 10 keys for typewriters. One object of my 111 Wardly turned ollps 7 extendmg more than vention is to provide a spring key for typeha way around the rlng and theseare 1nwriters which will be very inexpensive to tended to engage under the top or plate 2 manufacture and assemble, so thatthe defor the purpose of holding the spring key vice will compete favorably with otherforms in place. By havmg these CllPS extendin 15 of keys. Another object of the invention 1s. somewhat-more than half way around the to provide a very compact key, one in which IlIlg the key may be attached to the top 2 the top will be but slightly higher than the by sllfllng 1t laterally thereover, the oppoordinary non-spring key which it is intended. slte cllps 7' belng sprlmg open by 111118 action to replace. This is a decided, advantage sufliclently to pass the center of the top 2,

20 over the spring keys which extend up conafter whlch they sprmg back behind the siderably above the ordinary key and retop and cooperate with the. other clips in quire that extensions be applied to the space .holdlng the keyin place. bar to bring it up according to the increased The cap or shell cons sts of the top porelevation of the key tops. With my imtlon 8, the dependm flange 9 and the lat 25 proved key it is unnecessary to change the era lly and outwar y extending lugs 10.

s ace bar.

Another object of my invention'is to'prof r the key spring 12. The lugs 10 rest. vide a spring key, the parts of which may agalnst theflange 5 of the rim when the readily disassem'bledin order that the ca 1s 1n 1ts uppermost posltlon, thus; keep- 0 spring may be replaced if it should be mg the parts in operat1ve relation so far as 35 broken, upward movement of the cap is concerned.

Another object of my invention is to ro- The bottom plate 13 is detachable and it vide a .very simple means for attaching the 1s preferably spring key to the type lever. Other; ad-' shown at 14 to provide maximum spring 86 vantages will be apparent from the detailed space. This plate may have apertures 15 to 90 description hereinafter. receive a suitable wrench or spanner by i In the drawing forming part of this a which the plate is turned-to assemble or dis plication, assemble the parts of thekey. The plate 13 Figure 1 is a plan view of my improved is also provided with an upturned flange 40 key attached to the'typewriter lever, 1 1 6 which has as many slots or notches 17 Fig. 2 is air1 sectional view taken on the vas there are lugs 10 on the cap.

Fig. 3 is a sectional View taken on the line here shown as an ordinary S shaped spring 3-3 of Fig. 2, 12 and it is held under compremion between 45 Figftlis a sectional view taken on the line the cap and the-plate 13. Any suitable cov- H o ig. 2,

Fig. 5 is an inverted plan view of the key mstance, as a cellul01dnover-18, havmg a I attached to the lever, letter or number 19 I Fig. 6 is a plan view of the top or cap type bar which the key is to actuate. In B0 and the bottom plate; and assembling the key the cap is inserted into Fig. 7 is a plan view of the cap alone. the rig 4 from the bottom upwardly, until I have shown the spring key 1 attached the lugs 10 rest against the flange 5 of the over the fixed to or p ate 2 at the operative ring. The spring 12 is then inserted within end of the type ever 3 of an ordinary type the hollow cap and the plate 13 is posi- I water. I tioned so that the recesses 20 register with engagement the projections 6 of the ring. In this relation the plate may be insertedinto the ring until it passes the projections 6, and when thus placed the plateplaces the spring under compression. While the plate 13 is pressed against the spring it is turned, as with a spanner engaging in the holes 15 and this will turn the plate so that the recesses 20 no longer register with the projections 6 and the plate is then looked above these projections. In this assembling operation the late 13 is so positioned in relation to the cap that the lugs 10 on the latter enter into the slots 17 of the flange Fig. 6, so that both the plate and cap are turned together when the plate is being locked behind the projections 6. When the device is attached to the key lever 7 7 engage under th key in place. The plate 13 2, the spring rests on the plate 13 and it presses upwardly on the cap, holding its lugs 10 agains the flange 5. When the cap is struck by the finger, as shown in Fig. 2, it is driven downwardly, further compressing the spring 12; and upon releasing the finger pressure the cap returns to its upper position again. The downward movement of the cap will generally be very slight in hold the rests on the top actual operation. When the cap moves up or down its'lugs 10 are free tomove 1n the not of these lugs with the flange 16 of the plate. The edge of the lateral flange 5 of the ring- .acts as a guide all around the flange 9 of the cap and it steadies the cap so that it tends to move directly downwardly and upwardly.

If the spring 12 should be broken it is a very simple matter to replace it is only necessary to turn (after the key has been removed if lever 3) until the recesses 20 register with the projections 6, whereupon the plate may be lifted out of the ring. The broken parts of the spring are then removed, a new spring substituted for the broken one and the plate 13 is replaced and locked as beore.

In this construction the par-ts are very economically made by stamping or drawing them by machinery, the assembling is very simple, and it is always an easy matter to replace a broken spring at the place where the key is in use. The top of the key is but slightly higher than the top of the ordinary non-spring key, the parts are inclosed an there are no protrusions for the fingers to en age.

aving described my invention, what I claim is: r

1. A. spring key for typewriters, including relatively movable members and a spring adapted to be compressed between them, one

16, as shown in an outwardly extending pro ection at the bottom of said flange, a ring surrounding 'said relatively movable members, an inturned flange on said ring cooperating with theflange of said cap to guide the cap vertically and with which said outwardly extending projection of the cap cooperates to limit the upward movement of said cap.

2. A spring key for typewriters, including relatively movable members and a spring adapted to be compressed between them, of said members comprising a cap having an outwardly extending projection, a ring surrounding said relatively movable members and adapted to guide said cap, an inturned flange on said ring with which the projection of said cap cooperates to limit the upward movement of the cap and clips on said ring adapted to secure the sprin key to a typewriter lever.

3. spring key for typewriters, including relatively movable members and a spring adapted to be compressed between them, one of said members comprising a cap having an outwardly extending projection, a ring surrounding said relatively movable members and provided with an inturned flange with which the projection on the cap 00- operates to limit the upward movement of the cap and an inturned projection on sai ring for holding said relatively movable members in said ringfrom below.

' key for typewriters comprishaving vertically spaced inturned ing a ring e members inprojections, relatively movabl eluding a cap, disposed in said ring an adapted to be held in place by the inturned pro ections of said ring an ranged to be compressed between said relatively movable members. u 5. A spring key'for typewriters comprlsing a ring having an inturned flange, relatively movable members in said ring, inclu ing a cap having an outwardly extending rojection cooperating with said flange to limit the upward movement f the cap, lower inturned projections on said ring, the lower relatively movable member having peripheral recesses adapted to be registered with the lower projections of said ring, said lower relatively movable member may be inserted beyond said lower projections and then turned to lock it in place, and a spring arranged to be compressed between said relatively movable members} j 6. A spring key for typewriters", comprising a ring having upper and lower abutment members extending inwardly, a cap having outwardly extending lugs adapted to engage said upper abutment member, a bottom plate insertible in said ring and having an upturned flange provided with recesses to receive the lugs of said cap, and a spring a spring arwhereby spring arranged to be compressed between vided with slots to receive the lugs on said sai cap and said bottom plate. cap and having peripheral recesses adapted 15 spring key for typewriters, compristo be registered with said lower inturned ing a ring having means for securing 1t to projections on the ring, whereby said botthe type lever, an inturned flange at the tom plate may be entered beyond said latter upper edge of the ring and inturned proprojections and then turned to lock the jections below said ange, a hollow cap bottom plate in said ring and a spring arg having a depending flange and outwardly ranged to be compressed between said cap extending lugs at the bottom thereof, said and said bottom plate. 10 ring flange being adapted to guide said-cap Signed at the city, county, and State of vertically and cooperating with said lugs to New York, this 16th day of March, 1918. limit the upward movement of the cap, a

bottom plate having an upturned flange pro CHAS. H. JAN SEN 

